Digital SRAM-based CIM architectures must balance three critical factors: quantized neural network bitwidth, accuracy loss, and computational efficiency, each crucial to optimizing performance and efficiency. In Domain Specific Accelerators (DSAs), flexible and specific hardware design, when incorporated with tailored Power-of-2 (P-2) quantization schemes, addresses this issue. However, in CIMs, the absence of flexible and specific hardware to support dynamic switching between general and tailored quantization schemes hinders the adoption of efficient quantization methods. In this paper, we propose the I n-situ S hift O peration based Acc elerator ( ISOAcc ) for efficient SRAM-based multiplication. The key idea is to introduce transmission gates near the SRAM array to enable the selection of bits from either the same or the neighbor line when data flows from one row to another. This functionally equals a shift operation. By configuring the transmission gates array in a cascade manner, ISOAcc can support 0 to 15-bit shift with a negligible overhead. The ISOAcc can directly leverage P-2 quantization schemes in hardware, thereby greatly reducing multiplication cycles. We have chosen five well-known neural networks to evaluate ISOAcc. The evaluations show that ISOAcc achieves an average performance improvement of 3.24 × and an energy reduction of 75%, compared to the state-of-the-art (SOTA) SRAM-based CIM design, Bit-Parallel.

Gaoyang Zhao

Junzhong Shen

Rongzhen Lin

Hua Li

Yaohua Wang

ACM Transactions on Design Automation of Electronic Systems

TODAES 是电子系统设计和自动化领域的一流 ACM 期刊。它出版的创新工作记录了电子系统规范、设计、分析、模拟、测试和评估方面的重大研究和开发进展，强调计算机科学/工程方向。欢迎理论分析和实际解决方案。

ACM Transactions on Design Automation of Electronic Systems is a leading journal in the field of electronic system design and automation. It publishes innovative work that documents significant research and development advancements in the specification, design, analysis, simulation, testing, and evaluation of electronic systems, with an emphasis on the intersection of computer science and engineering. We welcome submissions of theoretical analyses and practical solutions.

《ACM Transactions on Design Automation of Electronic Systems》是电子系统设计与自动化领域的顶尖期刊。该期刊发表的创新研究涵盖了电子系统的规范、设计、分析、模拟、测试和评估等方面的重大进展，强调计算机科学与工程的交叉领域。我们欢迎理论分析和实际解决方案的投稿。

Category	Quartile
计算机科学	4
计算机科学, 计算机硬件	4
计算机科学, 计算机软件工程	4

ISOAcc: In-situ Shift Operation-based Accelerator For Efficient in-SRAM Multiplication

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Category	Quartile
COMPUTER SCIENCE, SOFTWARE ENGINEERING	2